Facebook, Tesla...Stock Bubble?

Some hot momentum stocks have tripled this year, sparking talk of a bubble. Here's what the charts say about Facebook, Tesla, Netflix, Qihoo 360 and others.

One of the technical analyst's tools of the trade is sentiment analysis. When investors start to throw caution to the wind and overlook tried-and-true methods of valuation, it is a good bet that the end is near.

Stocks such as Taser International (ticker: TASR) and Facebook (FB) grab the financial headlines as investors fall over themselves trying to keep up with the proverbial Joneses. Theoretically, "everyone" who wants to...